Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >
In the United States new 30-year normals are calculated every ten years. The most recent normals (using 1991-2020 data) are listed below, along with the previous set of normals (from 1981-2010), and the difference between the two normals packages. Click on the images to see larger versions.
Or, click here to see comparisons between the new normals and the previous (1981-2010) set of normals in graphical format for local cities (BWG, FFT, LEX, SDF, LOU).
TEMPERATURE
| ANNUAL | ||||||||
| 1991-2020 | Difference Between Old and New | 1981-2010 | ||||||
| Mean | Maximum | Minimum | Mean | Maximum | Minimum | Mean | Maximum | Minimum |
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| SEASONAL | |||||||||
| 1991-2020 | Difference Between Old and New | 1981-2010 | |||||||
| Mean | Maximum | Minimum | Mean | Maximum | Minimum | Mean | Maximum | Minimum | |
| Spring |  |
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| Summer |  |
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| Autumn |  |
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| Winter |  |
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| MONTHLY | |||||||||
| 1991-2020 | Difference Between Old and New | 1981-2010 | |||||||
| Mean | Maximum | Minimum | Mean | Maximum | Minimum | Mean | Maximum | Minimum | |
| January |  |
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| February |  |
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| March |  |
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| April |  |
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| May |  |
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| June |  |
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| July |  |
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| August |  |
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| September |  |
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| October |  |
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| November |  |
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| December |  |
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PRECIPITATION
| ANNUAL | |||
| Difference Between Old and New | |||
| 1991-2020 | Percentage Change | Value Difference | 1981-2010 |
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| SEASONAL | ||||
| Difference Between Old and New | ||||
| 1991-2020 | Percentage Change | Value Difference | 1981-2010 | |
| Spring |  |
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| Summer |  |
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| Autumn |  |
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| Winter |  |
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| MONTHLY | ||||
| Difference Between Old and New | ||||
| 1991-2020 | Percentage Change | Value Difference | 1981-2010 | |
| January |  |
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| February |  |
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| March |  |
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| April |  |
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| May |  |
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| June |  |
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| July |  |
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| August |  |
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| September |  |
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| October |  |
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| November |  |
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| December |  |
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DEW POINT
The following maps are from the PRISM Climate Group at Oregon State University
| January | February | March | April |
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| May | June | July | August |
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| September | October | November | December |
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